ALBANY — State corrections officials say they plan to close four more prisons in response to the shrinking number of drug offenders behind bars.

The state Department of Corrections and Community Supervision announced plans yesterday to close the minimum-security Monterey Shock facility in Schuyler County and three medium-security facilities: Butler in Wayne County, Chateaugay in Franklin County and Mt. McGregor in Saratoga County.

The prisons will remain open for a full year, giving administrators time to transfer inmates to others.

New York has closed seven prisons since 2011 and will close two more in September. The state currently operates 60 prisons.